Study on surrounding rock control technology of roadway in large mining height hard roof face

MA Wenwei

Safety in Coal Mines > 2022 > 53(8): 94-103.

MA Wenwei. Study on surrounding rock control technology of roadway in large mining height hard roof face[J]. Safety in Coal Mines, 2022, 53(8): 94-103.

Citation:

MA Wenwei. Study on surrounding rock control technology of roadway in large mining height hard roof face[J]. Safety in Coal Mines, 2022, 53(8): 94-103.

Citation:

MA Wenwei. Study on surrounding rock control technology of roadway in large mining height hard roof face[J]. Safety in Coal Mines, 2022, 53(8): 94-103.

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Study on surrounding rock control technology of roadway in large mining height hard roof face

MA Wenwei

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Published Date: August 19, 2022

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Abstract

Abstract

When there is a thick hard rock layer in the overlying strata of the roof of the deep coal mining face, the hard rock layer is not easy to collapse. In the process of rotary subsidence, the supporting stress in the coal mining face and coal pillar will increase sharply, resulting in abnormal ground pressure behavior and great difficulty in controlling the surrounding rock of the roadway. Taking 3304 working face with hard roof of Baode Coal Mine as the research object, using the methods of theoretical analysis, numerical simulation and field practice, this paper proposed the control scheme of roadway surrounding rock combined with roof cutting and pressure relief, reasonable width of coal pillar and bolt support with strong side and strong angle, and studies the control effect of reasonable parameters on roadway surrounding rock. The results show that when the cutting height is 16 m, the cutting angle is 10°, and the width of roadway pillar is 7 m, the control effect of roadway surrounding rock is better; after adopting strong side and strong angle support technology, the integrity of roadway surrounding rock is enhanced, and the difference between the maximum roof and floor displacement and the two sides displacement is reduced by 76.56%.
- hard roof,
- gob-side entry driving,
- ground pressure behavior,
- cutting roof and pressure relief,
- surrounding rock control

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References (25)

References

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Study on surrounding rock control technology of roadway in large mining height hard roof face

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